HEPData Search

Max results

Sort by

relevance
collaborations
title
date
latest

Reverse order

Showing 1 of 1 results

Date

Collaboration Reset

CBELSA/TAPS 1

Subject_areas

nucl-ex 1

Phrases

Angular Dependence 1
Cross Section 1
Exclusive 1
Inclusive 1
Integrated Cross Section 1
Photoproduction 1
Single Differential Cross Section 1

Reset Show All Next 5

Reactions Reset

GAMMA ( P + N ) --> OMEGA ( P + N ) 1
GAMMA DEUT --> OMEGA ( PN ) 1
GAMMA DEUT --> OMEGA X 1
GAMMA N --> OMEGA N 1
GAMMA P --> OMEGA ( P ) 1
GAMMA P --> OMEGA P 1

Reset Show All Next 5

Observables

DSIG/DCOSTHETA 1
DSIG/DT 1
SIG 1

CM Energies (GeV)

0.0 ≤ √s < 1.0
1.0 ≤ √s < 2.0
2.0 ≤ √s < 5.0
5.0 ≤ √s < 10.0
10.0 ≤ √s < 100.0
100.0 ≤ √s < 1000.0
1000.0 ≤ √s < 7000.0
7000.0 ≤ √s < 8000.0
8000.0 ≤ √s < 13000.0
√s ≥ 13000.0

Reset Show All Next 5

Authors

Anisovich, A.V. 1
Bacelar, J.C.S. 1
Bantes, B. 1
Bartholomy, O. 1
Bayadilov, D.E. 1
Beck, R. 1
Belogazov, Y.A. 1
Castelijns, R. 1
Crede, V. 1
Dietz, F. 1

Photoproduction of $\omega$ mesons off protons and neutrons

The CBELSA/TAPS collaboration Dietz, F. ; Metag, V. ; Anisovich, A.V. ; et al.

Eur.Phys.J.A 51 (2015) 6, 2015.

https://inspirehep.net/literature/1340913 Inspire Record 1340913 DOI 10.17182/hepdata.69767 https://doi.org/10.17182/hepdata.69767

ω photoproduction off hydrogen and deuterium has been studied with the tagged photon beam of the ELSA accelerator in Bonn for photon energies up to 2.0 GeV. The ω meson has been identified via the ω → π$^{0}$ γ → γγγ decay mode, using the combined setup of the Crystal Barrel/TAPS detector systems. Both inclusive and exclusive analyses have been carried out. Differential and total cross-sections have been derived for ω mesons produced off free protons and off protons and neutrons bound in deuterium. The cross-section for the production off the bound neutron is found to be a factor of ≈ 1.3 larger than the one off the bound proton in the incident beam energy region 1.2 GeV < E$_{γ}$ < 1.6 GeV. For higher incident beam energies this factor goes down to ≈ 1.1 at 2.0 GeV. The cross-sections of this work have been used as normalization for transparency ratio measurements.

85 data tables

Table 1

Differential cross-sections of $\omega$ mesons produced off the free proton versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.125-1.150 GeV.

Table 2

Table 3

Table 4

Table 5

Table 6

Table 7

Table 8

Table 9

Table 10

Table 11

Table 12

Table 13

Table 14

Table 15

Table 16

Table 17

Inclusive differential cross-sections of $\omega$ mesons produced off the free proton versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.125-1.150 GeV.

Table 18

Table 19

Table 20

Table 21

Table 22

Table 23

Table 24

Table 25

Table 26

Table 27

Table 28

Table 29

Table 30

Table 31

Table 32

Table 33

Total cross-section as a function of the incident photon energy for $\omega$ mesons produced off the free proton obtained from exclusive and inclusive analysis$.

Table 34

Slope parameter and horizontal level from the fits to the differential cross-sections $d\sigma/dt$ for $\omega$ mesons produced off the free proton.

Table 35

Differential cross-sections of $\omega$ mesons produced off the bound proton versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.158-1.208 GeV.

Table 36

Table 37

Table 38

Table 39

Table 40

Table 41

Table 42

Table 43

Table 44

Table 45

Table 46

Table 47

Differential cross-sections of $\omega$ mesons produced off the bound neutron versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.158-1.208 GeV.

Table 48

Table 49

Table 50

Table 51

Table 52

Table 53

Table 54

Table 55

Table 56

Table 57

Table 58

Table 59

Slope parameter and horizontal level from the fits to the differential cross-sections $d\sigma/dt$ for $\omega$ mesons produced off the bound proton.

Table 60

Slope parameter and horizontal level from the fits to the differential cross-sections $d\sigma/dt$ for $\omega$ mesons produced off the bound neutron.

Table 61

Inclusive differential cross-sections of $\omega$ mesons produced off deuterium versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.158-1.208 GeV.

Table 62

Inlusive differential cross-sections of $\omega$ mesons produced off deuterium versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.208-1.233 GeV.

Table 63

Table 64

Table 65

Table 66

Table 67

Table 68

Table 69

Table 70

Table 71

Table 72

Table 73

Sum of the exclusive differential cross-sections of $\omega$ mesons produced off the bound proton and off the bound neutron versus $\cos(\theta^\omega_{\mathrm{c.m.}})$ and versus the momentum transfer to the nucleon, $t$, for incident photon energy $E_\gamma$ = 1.158-1.208 GeV.

Table 74

Table 75

Table 76

Table 77

Table 78

Table 79

Table 80

Table 81

Table 82

Table 83

Table 84

Table 85

Total cross-section as a function of the incident photon energy for $\omega$ mesons produced off the bound proton $\sigma_p^{\mathrm{bound}}$, off the bound neutron $\sigma_n^{\mathrm{bound}}$, the sum of the two exclusive cross-sections $\sigma_p^{\mathrm{bound}}+\sigma_n^{\mathrm{bound}}$, the quasi-free inclusive cross-section $\sigma_{\mathrm{incl}}$ and the cross-section off the neutron calculated by $\sigma_{\mathrm{incl}}-\sigma_p^{\mathrm{bound}}$.

More…